if I = PRT/100, MAKE R THE SUBJECT OF THE FORMULA.

Answer:
R = [tex]\frac{100I}{PT} [/tex]
Step-by-step explanation:
I = [tex]\frac{PRT}{100} [/tex] ( multiply both sides by 100 to clear the fraction )
100I = PRT ( isolate R by dividing both sides by PT )
[tex]\frac{100I}{PT} [/tex] = R